ATI RN
Pediatric Immunization Practice Questions Questions
Question 1 of 5
Which of the following regulators inhibits C3convertase
Correct Answer: D
Rationale: CD46 (membrane cofactor protein) inhibits C3 convertase by promoting its degradation, regulating the complement system to prevent excessive activation.
Question 2 of 5
Which of the following clear Viral infected cells that doesn't exhibit MHC-1
Correct Answer: C
Rationale: NK cells target cells lacking MHC class I, a mechanism viruses use to evade CD8 T cells.
Question 3 of 5
How many binding sites there are between Complementarity Determining Regions (CDR) and an antigen on one Fab
Correct Answer: D
Rationale: Each Fab has one antigen-binding site, but with 3 CDRs per chain (light and heavy), there are 6 CDRs total contributing to binding.
Question 4 of 5
Macrophages serve as antigen presenting cells and activate
Correct Answer: B
Rationale: Macrophages present antigens on MHC to activate T lymphocytes.
Question 5 of 5
The adaptive immune system develops from stem cells originating in the
Correct Answer: B
Rationale: Adaptive immunity arises from stem cells in the fetal liver and bone marrow.